Electrical insulator.



A. B. SIMPSON. ELECTRICAL INSULATOR.

APPLICATION FILED APILZI. 1914.

1 ,25'8,05 1 Patented Mar. 5, 191&

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ALEXANDER .B. SIMPSON, OF JERSEY CITY, NEW JERSEY.

ELECTRICAL INSULATOR.

Specification of Letters Patent.

Application filed April 21, 1914. Serial No. 833,454.

The main object o my invention is to simplify, cheapen, and expedite the means of insulating the joint interconnecting a plurality of wires in electrical contact.

In insulating the joints of electric wires,

the time required to wrap the insulating tapes around the joint is very great, and the soiling of the hands and surrounding objects are often matters of serious expense.

My improvement consists in the peculiar construction of a hollow tube insulator hav ing screws to clamp the insulation of the group of interconnected wires. I

In order that my invention may be fully understood I shall first describe in detail the mode in which it is carried into practice, and then distinctly claim the invention.

Reference is made to the accompanying drawings forming a part of this specification, in which like parts are designated by the same numbers or letters in all the figures.

Figure 1 is a sectional view of my insulator secured to a large group of interconnected wires. Fig. 2, is a view of the wire receiving end opening. Fig. 3, is a sectional view of my insulator. Fig. 4 isa side view of the same figure.

In Fig. 1, the insulated wires are shown connected together bya binding screw device and the insulator consists of the hollow tube, designated by letter B, of porcelain, vulcanized fiber or other hard insulating substance, and the two screws'of corresponding insulating substance, designated by letter A, are threaded and fit loosely in the threaded holes 0 and 0 respectively, to form a space between-the screws for the joint, designated by letter C. To increase the scope of the clamping screws A, A, to follow any variation in the bulk of the insulations to be clamped the screws A, A are each made to screw into the body B as far as the radii center point line of the bore N, by continuing the threading of the openings 0, O on the inner sides of the bore N, so as to engage the threading of the screws A, A as far as the center point line of the bore N. On screwing in or screwing out the screws, A and A, the wireway is diminished or enlarged at will. I

The wires which may be of diiferent characteristics and sizes are grouped into two sets nearly alike in bulk, making a set for each end of the insulator; one group is passed through the tube by way of the openings, designated by letter O, and all the wires are then connected together by soldering or clamping, after which the insulator is moved to cover the joint C; by screwing in the screws A and A, the insulations of the various wires are forced close together and tight against the wall of the tube, and clamped securely in position.

It is evident that the shape of the tube is not confined to the form shown but may be square or other shape without departing fromthe boundaries of my invention."

I'claim as my invention: M

An insulator of hard insulating material, consisting of a hollow tube with open ends, a threaded screw opening in the wall of the tube close to each end, and at right angles with and of the same diameter as the bore of the tube, thethreading being continued through the wall on the inner surface of the bore to a depth of half the diameter of the bore, a headless screwof hard insulating material, having a flat top and a fiat tip, fitted loosely in ea h of the threaded openings, to clamp a group of wires passed through the insulator, between the screw tips and the inner surface of the tube.

Signed at Jersey City in the county of Hudson and State of New Jersey this sinth day of April A. D. one thousand, nine hundred and fourteen.

ALEXANDER B. SIMPSON.

Patented Mar. 5, 1918. 

